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171b357d18
The SCREEN_DISABLE bit controls scanout from display memory. The bit affects all planes, so set it only in the CRTC's atomic enable and disable functions. A number of bugs affect this fix. First of all, ast_set_std_regs() tries to set VGASR1 except for the SD bit. But the read bitmask is invert, so it preserves anything except the SD bit. Fix this by re-inverting the read mask. The second issue is that primary-plane and CRTC helpers modify the SD bit. The bit controls scanout for all planes, primary and HW cursor, so set it only in the CRTC code. Further add a constant to represent the SD bit in VGASR1. Keep the plane's atomic_disable around to make the DRM framework happy. v2: - fix typos in commit message Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240627153638.8765-7-tzimmermann@suse.de |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.